Plug and receptacle switch



April 11, 1939. w. H. FRANK 2,154,238

PLUG AND RECEPTAGLE SWITCH Filed July 30, 1937 2 Sheets-Sheet l 7 ls l2 v /o t I l w I A) gYENTOR.

BY (flaws/w ATTORNEY.

m J In these-drawings,

resent d Apr. u,.iasa

moo m wlmm mmnn nee-on.- men. Application Inn, :0, 1931, Serial No. 1mm acism (ciao-114 This application. some to plug and receptacle 7 r A principal object of the invention is to provide a plug andvreceptacle switch which is ex- 5 tremely compact oi' manuiacture and extensivefot operation, these results being obtained by e novel arrangement or parts. j

Further objects willbestbe understood on reference to the disclosing the switch.

m. 1, shows the switch in {rent elevation with thfeplug thereoi cutaway. 7

7 .ms. 2 and 3ar e 'sectims on lines 2-2, 3-3,

' "is 'Flgs. 4, some 0 illustrate the cooperation of the parts iorswitchinm;

The switch herein illustrated ice! the two pole type and comprises a cup shaped body ll adapted to receives plug-or head ii. The z'ybody is shown as'ii mountedon-a vertical wall.

The twin plug Ii a front It, a top I II, and a centralbar'rier .i'l projecting rearwardlyi'r'om the. front. 'lhe'top is dividedby the iront so that itis dividedinto two parts, one a blade 2: or plate part "and other-ahandle part II containing iingcrgrip holes II. Ledges ll connect handle part 11 to front part II to relni'orce the plug. All of .the plug parts [2-41 are pref,-

' -erably integral and are shown as formed of a which are near the contacts" and others of which are remote from the contacts. 2|. On opposite surfaces of the plug blade II, and ior engaging the pairs oi stationary contacts 2| there are provided pairs oi contacts. On one surface at the plug blade 16 are mounted plug fuse socket shells I'I; rivets 28 whose heads are within the shells and form the center contact! of the latter, are electrically connected to cor 'tain oi the contacts 21; the shells 21 are: electrically connected to the other contacts 24; thus contacts 20 may be interconnected through contacts 24, rivets 2l,-and plug fuses ll within the shells 21. The rivets 28 hold the parts together. When the plugis plugged into, the cup (Figs. l, 2, 3', 4, and 5) the plug front I! forms a closure for the open front of the cup and covers all of the parts within the-cup, and thus debars access to the live parts within the cup.

In order to guide the phig as it is plugged into 56 the cup, in the on" position 01- Figs. 3 and 4, or

the oil position of Fig. 5, there are provided, in the side walls of the cup i'our slots 3| with pairs thereoi designed to receive side edges of the plug blade ll. When the plug .is plugled to the cup, as in Figs. 3 and 4 the side edges 0! the I blade ride in the slots 8' nearer the contacts 2. and the parts assume the position of Fig. 3, with the blade end in the backwall openings 22, and with contacts engaged by contacts 24. On the other handwhen the plug is to beinserted 10 into the cup in the "oi!" poaition'ot Fig. 5, the plug is reversed 180 from the position 01 Figs. 3 and 4 to the position of Fig. 5 and plugged in; the side edges oi the blade then ride in the slots 35 at the end of the cup more remote from the II contacts 20, and the blade end fits into others oi the back wall openings 21; contacts 20 are not engaged by the contacts 24 and consequently a circuit through the switch is not established.

It will be observed that contacts 20 are pron tectedirom accidental contact, when the plug is removed and the front of the receptacle is open,

by the formations at ll, integral with the receptacle, and through 'a slot ll of which rides the blade I. and the contacts 24.

The extended or rear end I 01 the blade, as extended beyond the contacts 2|, cooperates with the walls of slot II to provide an arc snufling means for the contacts.

I claim: so

' 1. In a switch, a block of insulation having a deep slot'opening thereinto from the front thereoi, adjacent contacts in said block on opposite sides of said slot, a blade adapted to slide in said slot and having on opposite sides contacts for 35 engaging the block contacts, a iuse carried by said-blade and connecting the blade contacts.

2. In a switch, a receptacle comprising a cup shaped body having a deep slot opening thereinto from the bottom oi the cup depression in the o f-body, adjacent contacts in said body on opposite v sides 01 said slot, a blade adapted to slide in said slot and having on its opposite sides contacts which engage the body contacts whenthe blade is in the slot in "on position and which do not '45 otherwise engage the body contacts, the blade being formed aspart of a plug having a closure portion transverse to the blade and defining a I closure for the cup depression of the body when the blade is in the slot, the blade contacts being go behind the plug closure portion, and the body contacts being behind the plug closure portion so that when the blade is in the slot all contacts are concealed and inaccessible, the plug carrying behind the plug closure portion a fuse receiver the plug having a'handie in front of the plug closure portion.

3. In a switch, a receptacle comprising a cup shaped body having a deep slot opening thereinto from the bottom of the cup depression in the body, adjacent contacts in said body on opposite'sides of said slot, a blade adapted to slide in said slot and having on its opposite sides contacts which engage the body contacts when the blade is in the slot in on" position and which do not otherwise engage the bodvcontacts, the blade being formed as part of a plug having a closure portion transverse to the blade and defining a closure for the cup depression of the body when the blade is in the slot, the blade contacts in which is a fuse bridging the blade contacts,

being behind the plug closure portion, and the body contacts being behind the plug closure portion so that when the blade is in the slot all contacts are concealed and inaccessible, the plug carrying behind the plug closure portion a fuse receiver in which is a fuse bridging the blade contacts, the plug having a handle in front of the plug closure portion, the slot .being at one end of the cup depression, and theplug and body parts being so designed that the plug may be plugged into the cup depression in either one of two reverse positions, with the blade at an end of the cup depression, near or remote from the slot.

wnnm n. RANK. 

